Smoke-consuming furnace



(No Model.) v

L. A. SEAR$ 8?; F. RICE.

SMOKE GONSUMING FURNACE. No. 602,962. Patented Apr. 26, 1898;

, Inz/eniar 17%. 8 m

UNITED STATES iArnNr rricn;

LEE A. SEARS, OF NEVADA, MISSOURI, AND FRANK RICE, OF KANSAS CITY, KANSAS. i

SMOKE-CONSUMING FURNACE.

SPECIFICATION formingpart of Letters Patent No. 602,962, dated April 26, 1898.

Application filed July 22, 1897. Serial No. 645,567. (No model.)

To all whom it 777/661] concern.-

Be it known that we, LEE A. SEARS, of Novada, Vernon county, Missouri, and FRANK RICE, of Kansas City, 'Wyandotte county, Kansas, have invented certain new and useful Improvements in Smoke-Consuming Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part thereof.

Our invention relates to smoke-consuming furnaces and our object is to produce appliances which may be easily and cheaply secured in connection with furnaces of the usual type and which are positive and reliable in operation.

To this end the invention consists in certain novel and peculiar features of construction and combinations of parts, as will be hereinafter described and claimed.

In order that the invention may be fully understood, we will proceed to describe it with reference to the accompanying drawings, in which Figure 1 represents in side elevation,broken away, a smoke-consumin g furnace embodying our invention. Fig. 2 represents a rear elevation of the same, the furnace-wall being broken away in said figure also.

Referring to the drawings in detail, 1 designates a furnace 2, the grate; 3, the ash-pit; i, the fire-box; 5, the boiler; 6, the steamdome, and 7 the smoke-stack.

8 designates a smoke-reservoir which is mounted longitudinally upon and at the rear end of the boiler, being supported in place, preferably, by means of brackets S, secured to the boiler. Said reservoir is provided with an opening closed normally by a hand-hole plate 9 of the customary arrangement. 10 designates a pair of obtuse-angle pipes which communicate with and depend from the rear end of said reservoir and are provided at their lower ends rearward of the boiler with the flaring mouths or funnels 11 for a purpose which will be presently explained.

12 designates a pipe which communicates with the front and lower end of the reservoir and extends by preference externally of the furnace and communicates at its lower end with the horizontal pipe 13, which at its inner end communicates with the ash-pit, as shown clearly in Fig. 2.

14 designates a pipe leading from the steamdome and provided with branches, coupled at their lower and rear ends to the injector" pipes 15, which project into the depending pipes 10, hereinbefore described, and are controlled by valves 16.

17 designates a branch pipe from the pipe 14 which communicates at its lower end with an injectorpipe 18 projecting into the rear end of the horizontal pipe 13 and controlled "by a valve 19.

a In practical operation as the fire is started in the furnace the smoke, due to the natural draft, passes rearwardly under the boiler,and as it makes a bend preliminary to passing back through the tubes of the same its movement is for the fraction of an instant arrested, and this hesitation, due to the natural draft of the furnace, insures practically all of the smoke and combustible gases entering the flared months or funnels 11 and passing thence into the reservoir 8. Owing to the fact that this reservoiris of large capacity and that the draft through it and its connectingpipes is comparatively weak, it takes some time before the reservoir is completely filled and a little more time before the smoke, pass ing slowly forward through the same and through the pipes 12 and 13, can reenter the furnace below the grate. By this time the fire has begun to burn brightly. Consequently the black smoke and gases as they rise from the ash-pit are thoroughly consumed, their progress being retarded, by making the reservoir of large capacity, until the fire is capable of handling it. By this time also steam is beginning to be generated and passes under a gradually-increasing pressure back through the pipe or pipes 14 and injectors 15 up through the pipes 10, and consequently creates a suction which positively and reliably draws all the combustible gases and smoke reaching the rear end of the boiler up through the reservoir and discharges it back into the ash-pit in order that as it rises through the grate and fire it may be effectually consumed. During this operation the valve of the injectorlS is preferably closed and is opened probably once or twice a day to force steam for- Wardly through the pipe 13 in order to create a suction which will withdraw the soot and accumulations from the interior of the reservoir and discharge it into the ash-pit. To facilitate this discharge, of course, the handhole plate 9 will be removed and a scraper inserted and manipulated, so as to loosen the soot and other accumulations from the Walls of the reservoir.

It will be understood that by turning the smoke and gases loose under the fire above the ash-pit it has ample time to mix with air and therefore be easily consumed.

From the above description it will be apparent that the use of our invention will result in an economical consumption of fuel and at the same time the smoke nuisance will be obviated, as all of the smoke and black gases are thoroughly consumed.

Having thus described the invention, What we claim as new, and desire to secure by Letters Patent, is-

In a smoke-consuming furnace, the combi nation of a reservoir 8 upon the rear end of the boiler, apair of pipes 10, depending from the rear end of the reservoir and terminating in flared mouths or funnels 11, a pipe 13, extending through the Wall of the furnace and arranged to discharge beneath the grate, a pipe 12, connecting the same with the reservoir, a pipe 14, connected to the dome of the boiler, and provided with branches, nozzles 15, and 18, for said branch pipes, projecting respectively into pipes 10 and 13, and valves controlling said nozzles, substantially as described.

In testimony whereof We afiix our signatures in the presence of two Witnesses.

LEE A. SEARS. FRANK RICE. Witnesses as to signature of Lee A. Sears:

0. O. LYNCH, EUGENE PARRIsH. Witnesses as to signature of Frank Rice:

M. R. REMLEY, G. Y. THORPE. 

